"Resanta SAI-220" - reviews. Welding inverter "Resanta SAI-220"

For today in the market of offered welding devices a huge choice of various models and brands of manufacturers. One of the presented brands, which should be given attention, is a modern welding machine with an inverter "Resanta SAI-220 PN".

Operating principle

The principle of operation of welding machines is that a phase-to-phase voltage of 0.4 kV AC of a standard frequency of 50 Hz is converted to a constant voltage of 400 V, after which the inverter converts to a high-frequency voltage, and it is again rectified by a diode bridge. Unlike a welding transformer with an ordinary rectifier, in a welding machine with an inverter, the standard alternating voltage passes not three stages, but three, but the constant operating voltage is 90% full compared to 60%, which is obtained from the welding machine. The welding machine "Resanta SAI-220 PN", due to the use of high-quality semiconductor material, gives a constant voltage of even 95% fullness. That is, it makes it possible to keep a uniform arc of welding much more stable than other welding machines.

Advantages of this welding machine

1. Presence of a current regulator on the arc of welding.
2. Intensive forced cooling of the elements of the device through which a large current passes, which ensures continuous continuous operation.
3. The presence of the function "anti-adhesion", which in automatic mode reduces the working current when the electrode is sticking on the product during the arc ignition. When the electrode detaches, the device restores the original, configured parameters.
4. The presence of the "hot start" function, which improves the arc ignition with a short pulse of increased operating current parameters.
5. Steady arc burning, which is not affected by the unexpected fading that was characteristic of welding transformers.

Professional welders who worked with the device "Resanta SAI-220", their reviews focused on these advantages of the device. Also, workers focus on the fact that inverters greatly facilitate the work of welders and make it better.

Device Performance

Devices "Resant SAI-220" technical characteristics have such that enable the welder to work in a fairly wide range of input and output voltages with a stable maintenance of the operating current on the arc. Good controllability of the arc is ensured by the fact that intensive cooling allows to keep the arc with a given current for a long time.

1. The input voltage on the device is from 140 V to 240 V.
2. The maximum current consumption at the input is 30 A.
3. At idle, the voltage is maintained at 80 V.
4. The voltage at burning the arc is 28.8 V.
5. The welding working current is adjustable in the range from 10 A to 220 A.
6. Continuous loadability of the device is 154 A (70% of Imax).
7. The diameter of the electrode, which can be used in the "SAI-220" - from 1.6 mm to 6 mm.
8. The class of protective safety is IP21.

It is able to work stably and qualitatively at ambient temperature from -10 ^о С to +40 ^о С. It is not allowed to work under the open sky at atmospheric precipitation.

External device of the product

"Resanta" inverter "SAI-220" is a metal case, in front of which there is a panel. Here there is a regulator of the magnitude of the operating current, indication "Network", indication "Overheating" and power current connectors for connecting DC cables. The welding machine has a forced cooling system. For this reason, it is strictly forbidden to lock the ventilation holes in the housing.

The operation of the "overheat protection" system is indicated by a light bulb, which is located on the panel. On the housing near the connectors for working cables of direct current there are clear signs: "-" power terminal and "+" power terminal. There is a tumbler switch off the network - "Network" and a light bulb - "Network". A belt is made from above for easy transportation and operation of the device.

Internal structure of the product

The welding inverter "Resanta SAI-220 PN" consists of the following main units:

1. The power unit of the transient rectifier of standard and low voltage with a frequency of 50 Hz.
2. Inverter power block, which converts the DC voltage into a high-frequency alternating current.
3. Power high-frequency transformer, which lowers the input voltage to the necessary, safe for people work voltage.
4. The power unit of the high-frequency transistor rectifier, which rectifies the high-frequency current with the lowered transformer voltage.
5. Stabilizing choke, which serves to smooth the pulsation of the rectified and stabilized current of the working welding voltage.

All semiconductor devices are based on MOSFET or IGBT transistors. High properties of the stable dynamics of arc combustion are provided by the use of semiconductor elements, which are produced using the most modern technologies.

Device protection

The manufacturer made every effort to ensure that the welding devices of the "Resant SAI-220" were safe in operation, not only for professionals, but also for those engaged in welding operations from time to time.

The most important point in this problem is the insulation of the current-conducting parts of the apparatus. Connection to standard equipment is carried out by a flexible cable with double insulation, which can withstand voltage without breakdown up to 3000 V for 2 minutes.

The internal units of the welding machine are fixed fixedly on insulators that have been tested for breakdown when manufacturing 1000 V for 3 hours. Do not dusty these insulators with metal dust and shavings. Do not allow moisture to enter the device to prevent the phase from grounding, which will inevitably cause the device to malfunction.

The mechanical safety of the AIS corresponds to the class IP21. That is, objects with a thickness of more than 12 mm can not enter the device.

The order of preparation of the device for work

Attention! Connection of the device "Resanta SAI-220" (the welder's comments indicate and the manufacturer's instructions say) should start with the assembly of a low-voltage circuit:

1. Check the disconnected position of the "Network" switch.
2. Connect the welding cables of the required cross-section to the working power terminals: "-" and "+"; Check the connection of the electrode holder to the cable that is necessary for the welding conditions.
3. Securely connect the second working power cable to the product with which the work will be carried out.
4. Connect the "Resant AIS" housing to a stationary grounding device; If not, then to a portable grounding in the form of a pin of at least 140 cm long, which is clogged to the ground at a distance of at least 5 m from the apparatus.
5. Connect the device to a standard voltage network; Apply standard voltage to the machine.
6. Turn the "Network" switch to turn on the welding machine.
7. Rotate the regulator of the working DC value to set the required current mode of the specific operation.
8. Check for short of power cables.

The modes that depend on the diameter of the electrode used, the operation of the inverter welding machine, are as follows:

• 1.6 mm - 20-45 A;
• 2,0 mm - 45-70 A;
• 2.5 mm - 65-85 A;
• 3.2 mm - 90-145 A;
• 4,0 mm - 130-195 A;
• 5,0 mm - 160-220 A;
• 6.0 mm - 210-300 A.

Safety during operation of AIS

If you analyze the "Resant SAI-220" reviews of welders who have worked on it for a long time, then we can conclude that this device is very safe and convenient to use. However, you should follow these safety rules:

1. If there is no ground through the power cord, the installation of a portable ground is a must.
2. The place of welding should be well ventilated, because during welding, many toxic and harmful gases are formed.
3. The welder should work in a special welding suit to avoid burn injuries.
4. To protect the eyes and face without fail, use a welding shield or a welder mask.
5. Fire safety measures during welding should be carried out in full accordance with the standard instruction, from which the removal of items is not permissible.

Welding inverter on the Russian market

Inverter welding machines are becoming more popular with consumers. Especially they became popular among non-professionals due to their low weight (up to 6 kg), ease of operation and ease of use. Prices for them are quite democratic: from $ 150 to $ 250 per device.

On "Resanta SAI-220 PN" the price ranges from $ 210 to $ 240 for various modifications, the performance of which depends on the used semiconductor elements and units. Simplicity in servicing allows the AIS to win leading positions among similar products.

The manufacturer constantly listens to the opinions of its customers and tracks the dynamics of not only sales, but also reviews of its products. For this purpose, a special website on the Internet has been created, where every interested and indifferent person can leave feedback. These reviews are interesting not only to the manufacturer, but also to other consumers.

Operation of inverter welding machines

Basically, the welding machine "Resanta SAI-220" reviews the most positive and flattering. But there are those in which it is said that when working on it in wet weather it is "tweaked" by an electric current. It is useful for such consumers to remind once again that working with any electrical devices and devices is fraught with danger if one does not observe elementary safety rules. The device weighing only 5,5 kg while welding an electrode with a diameter of 5 mm has a power of 15 kW, which is enough to throw a stone in 10 kg by the height of a three-story house. Therefore, extra care when working with energy-intensive equipment does not happen.

All the precautions and safety precautions described in the instructions to the device must be strictly observed. If there is no RCD and three-core power supply system with a stationary grounding device, it is mandatory to have a portable temporary grounding and use it.

Repair of inverter welding machines

Folk craftsmen are able to repair everything. And against this hobby no one has anything against. But repairing the "Resanta SAI-220 PN" is far from easy. Its high technical characteristics are ensured by the fact that all the constituent parts of this welding machine are very accurately balanced. It does not fit any inverter. No, if another inverter that allows the current to pass through the device at the low side output of about 220 A, then the device will work, but the stability of the welding arc will decrease. This is unambiguous. A mismatch between the input and output resistances of the inverter to the rectifying power unit will greatly reduce its durability. And this is so for each node.

If the welding machine AIS went off-line, it is best to contact the service center, where the failed nodes will be replaced with the original ones. It should be noted: if you do not allow moisture and metal dust and chips to get inside the device, if you do not allow long overheating of the units, then the device will be faithful and true for decades.